All right, I think I concede your point. (Not to say I will stop thinking about this issue, of course -- have to be in a constant state of "crisis of belief" &c.) I also think we agree fundamentally about a great many of these points you made in this comment to begin with and perhaps I did not verbalize them coherently -- such as "behaving for all practical purposes as if a given T were true" and so on. The majority of your last paragraph is new to me, however. Thanks.